4results about How to "Wide spectral response range" patented technology

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The application discloses a lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material with regular flower-like morphology and a preparation method and application thereof. A lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material BiOX / C with regular flower-like morphology, wide spectral response range, high efficiency and strong stability is synthesized by using lignin carbon with rich oxygen-containing functional groups for induction and pH regulation. Based on the flower-like morphology structure and Z-type heterojunction of the material, the separation of photo-generated carriers and holes is effectively promoted, so that the material has higher photo-reaction efficiency, and the shortcomings of traditional photocatalytic degradation of organic pollutants, such as low quantum efficiency, slow degradation rate, poor stability, easy deactivation and the like, are effectively solved. Moreover, the lignin carbon-based substrate material takes lignocellulose in agricultural waste as a carbon source, is environment-friendly and low in production cost, and has the advantages of simple synthesis method, considerable yield, mild reaction condition in the process of photocatalytic degradation of organic pollutants, simple operation and wide application prospect.

The application relates to a kind of cascade low-temperature single-photon detectors based on torsion semimetal materials, comprising: substrate, cascade structure and electrode;Wherein, the cascade structure is arranged on the substrate;The electrode is arranged on the cascade structure;The cascade structure is formed by the alternating stacking of dielectric layer and Dirac semimetal material;The outermost layer of the cascade structure from bottom to top and from top to bottom is the dielectric layer;The electrode includes a top gate electrode arranged at the top of the cascade structure and a plurality of source / drain metal contact electrodes arranged on the Dirac semimetal material.The beneficial effects of the application are: the Fermi level of the Dirac semimetal material used in the application is adjustable, the internal carrier concentration is controlled by the gate region, and the single-photon energy can excite to generate a photovoltage signal.